... is the angle swept clockwise from the reference point to the intersection. The ranging distance and direction guide the steering of the SW. By adjusting the drilling parameters and the application of AMR, the trajectory can be controlled to reach the desired target. The inclination and azimuth...

...Wucheng Sun; Yakun Tao; Zhiming Wang; Songcheng Tan; Longchen Duan; Xiaohong Fang Summary As an efficient method for hard rock fracturing, rotary-percussive drilling has been widely used in various scenarios, especially deep drilling. Drilling parameter monitoring and control are necessary...

...-breaking efficiency, and service life of the bit. The special three-ribbed ridge structure of the nonplanar cutter has changed the interaction mode between the cutter and the rock. Its successful application in the plastic formation provides a reference for faster drilling of PDC bits in hard-to-penetrate...

...Liangliang Ding; Wenkang Chen; Chuanjun Han; Hailong Geng; Qiang Zhang Summary Among the casing failures in 46 ultradeep wells in a particular block, 11 ultradeep wells had the same casing failure forms occur during the drilling of cement plugs. The casing failure forms are local bending...

...Siavash Nejadi; Nasser Kazemi; Jordan A. Curkan; Jean Auriol; Paul R. Durkin; Stephen M. Hubbard; Kristopher A. Innanen; Roman J. Shor; Ian Donald Gates Summary The oil and gas industry, operating and service companies, and academia are actively searching for ways to look ahead of the drill bit...

...Ane E. Lothe; Pierre Cerasi; Manuel Aghito Summary A digitized workflow from predrill pore‐pressure modeling with a Monte Carlo approach until update of the pressure prognosis while drilling from (for example) sonic or resistivity data is described. The approach has the potential to reduce...

... thermal mechanical interaction numerical model Reservoir Characterization strength vaporization rock sample thermal-expansion coefficient thermal property cohesive strength Upstream Oil & Gas discontinuity perforation Drilling interaction thermal conductivity Laser mechanical damage...

...–temperature–sensing (DTS) technology to monitor the cement placement. DAS data were acquired continuously for 9 days during drilling and injection testing of the reservoir interval in the 12¼–in. openhole section. The DAS data were used to calculate average–axial–strain–rate profiles during different...

... to account for the uncertainty in future development activities while optimizing current decision variables (e.g., well controls and locations). A motivating example is presented first to demonstrate the significance of including the uncertainty in future drilling plans in oilfield‐development optimization...

...Xianzhi Song; Zhaoyu Pang; Zhengming Xu; Gensheng Li; Baojiang Sun; Zhaopeng Zhu; Ruiyue Yang; Zehao Lyu Summary Microhole–horizontal–well–drilling technology is a high–efficiency and low–cost technology that has developed rapidly in recent years. However, during microhole–horizontal–well drilling...

...Feifei Zhang; Yongfeng Kang; Zhaoyang Wang; Stefan Miska; Mengjiao Yu; Zahra Zamanipour Summary This paper identifies wellbore-stability concerns caused by transient swab/surge pressures during deepwater-drilling tripping and reaming operations. Wellbore-stability analysis that couples transient...

...Chao Liu; Younane N. Abousleiman Summary This paper investigates the effects of mudcake and formation multiporosity/multipermeability on the evolution of a safe-drilling mudweight window. The analytical poroelastic solutions for an inclined wellbore drilled through a multiporosity/multipermeability...

...Xuyue Chen; Deli Gao Summary Ultra-extended-reach wells can be drilled from one platform to develop the remote surrounding satellite oil and gas reservoirs in deepwater. Although the platform is in shallow water, some ultra-extended-reach wells can target the reservoirs in deep water. In ultra...

...Xianzhi Song; Zhengming Xu; Mengshu Wang; Gensheng Li; S. N. Shah; Zhaoyu Pang Summary Microhole-drilling technology is a high-efficiency and low-cost technology that has developed rapidly in recent years. However, during microhole-horizontal-well drilling, cuttings are easy to deposit...

...Ben Li; Hui Li; Boyun Guo; Xiao Cai; Mas lwan Konggidinata Summary Gas-hydrate cuttings are conveyed upward by the drilling fluid through the outer drillpipe/wellbore annulus during the gas-hydrate-well-drilling process. The temperature profile along the wellbore during the drilling process has...

... analyze the mechanism of improving the rate of penetration (ROP) for pulsed-jet drilling on the basis of the model. Laboratory experiments are used to obtain the relationship of bit hydraulic horsepower between pulsed jet and continuous jet, and then the MSE model of pulsed-jet drilling is established...

... and optimize many foam-associated processes including tight-gas and shale-gas foam fracturing, foam underbalanced drilling, foam liquid unloading, and cuttings transport. Analyzing the experimental data of surfactant foams and polymer-added foams shows that (i) in the low-quality regime, foam rheology...

...A.R.. R. Edrisi; R.N.. N. Gajbhiye; S.I.. I. Kam Summary The foam-assisted underbalanced-drilling technique is more advantageous than the traditional overbalanced drilling near the productive water-sensitive formations because of its reduced formation damage, improved rate of penetration, higher...

... with time, expressed as ( Wang 1994 ) (6) f ( t ) = 0.9821 ln ⁡ ( 1 + 1.81 a t R w b ) . The total heat transfer of foam in annulus is the sum of the two parts. We have Copyright 2010, Society of Petroleum Engineers drilling fluid selection...

...Vinh X. Nguyen; Younane N. Abousleiman; Son K. Hoang Summary Numerous time-dependent wellbore-instability problems have been reported while drilling through the chemically active fractured-shale formations in the Arabian Gulf. Very often, these shales are characterized by the abundance of not only...